Patent US4414278A successfully refreshed from Google Patents.
US4414278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinked triacrylate polymer beads
Assignee: EIDP Inc
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Filing: 1982-04-22
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Granted: 1983-11-08
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Expires: 2002-04-22
Abstract
Abstract Discrete, substantially nonswellable crosslinked polymeric beads, 0.7 to 20 μm average diameter wherein at least 90% of the beads by population are below 20 μm, which are nonagglomerating in any solvent or solvents including solvents for the liquid monomer or monomers used in preparation thereof. The polymeric beads are homopolymers of tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers thereof, copolymers of one of said acrylate or methacrylate monomers with up to 50% of a monomer having a single terminal ethylenic group or with up to 75% of a monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers defined above.
Inventors
- 👤 Abraham B. Cohen
- 👤 Christina N. Lazaridis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:17
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/10; C08F22/1006; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
Discrete, substantially nonswellable, crosslinked polymeric beads having an average diameter size in the range of 0.7 to 20 μm, wherein at least 90% of the beads by population are below 20 μm, the beads being nonagglomerating in any solvent or solvents including a solvent or solvents for the monomer or monomers used in the preparation of the polymeric beads which are taken from the class consisting of homopolymers of tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of said tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 25% by weight of at least one monomer having one terminal ethylenic group, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 50% by weight of at least one monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers.
Claim 2
Dependent Claim
160 words
Discrete, substantially nonswellable, crosslinked polymeric beads having an average diameter size in the range of 0.7 to 20 μm, wherein at least 90% of the beads by population are below 20 μm, the beads being nonagglomerating in any solvent or solvents including a solvent or solvents for the monomer or monomers used in the preparation of the polymeric beads which are taken from the class consisting of homopolymers of tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of said tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 25% by weight of at least one monomer having one terminal ethylenic group, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 50% by weight of at least one monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers.
Claim 3
Dependent Claim
97 words
Polymeric beads according to claim 1 which are homopolymers of trimethylolpropane triacrylate, trimethylolpropane, trimethacrylate, pentaerythritol triacrylate, glycerol triacrylate polyoxypropyltrimethylolpropane triacrylate, polyoxyethyltrimethylolpropane triacrylate, pentaerythritol tetraacrylate, pentaaerythritol tetramethacrylate; copolymers of said monomers; copolymers of said tri- and tetraacrylate or tri- and tetramethacrylate monomers and up to 25% by weight of at least one monomer having a single terminal ethylenic group; copolymers of said tri- and tetraacrylate or tri- and tetramethacrylate monomers and up to 50% by weight of at least one monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers.
Claim 4
Dependent Claim
13 words
Polymeric beads according to claim 1 which are a homopolymer of trimethylolpropane triacrylate.
Claim 5
Dependent Claim
13 words
Polymeric beads according to claim 1 which are a homopolymer of trimethylolpropane trimethacrylate.
Claim 6
Dependent Claim
13 words
Polymeric beads according to claim 1 which are a homopolymer of pentaerythritol triacrylate.
Claim 7
Dependent Claim
13 words
Polymeric beads according to claim 1 which are a homopolymer of pentaerythritol trimethacrylate.
Claim 8
Dependent Claim
23 words
Polymeric beads according to claim 1 which are a copolymer of trimethylolpropane triacrylate and up to 50% by weight of triethylene glycol diacrylate.
Claim 9
Dependent Claim
22 words
Polymeric beads according to claim 1 which are a copolymer of trimethylolpropane triacrylate and up to 50% by weight of pentaerythritol triacrylate.
Claim 10
Dependent Claim
34 words
Polymeric beads according to claim 1 wherein the average diameter sizes are in the range of about 1 to 10 μm, wherein at least 90% of the beads by population are below 10 μm.
Claim 11
Dependent Claim
14 words
Polymeric beads according to claim 1 wherein the monomer or monomers are liquid compounds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |